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Sequoia <br />Analytical <br />Gettler Rvan lnL - Dublin <br />6747 Sierra Court Suite J <br />Dublin CA 94568 <br />Project Chevron <br />Project Number Chevron #! 9-5775 <br />Project Manager Scott Polston <br />404 N Wiget Larie <br />Walnut Creek CA 945% <br />(925) 988-9600 <br />FAX (925) 988-9673 <br />www sequolalabs corn <br />Reported <br />07 -Jun -00 10 12 <br />Total Purgeable Hydrocarbons (C6 -C12) and BTEX by DHS LUFT - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC RPD <br />knalvte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />Batch OF05001 - FPA 5030E IPITJ <br />Blank (OF05001-BLK1) <br />Prepared & Analyzed 05 -Jun -00 <br />Purgeabie Hvdroc.arbons <br />ND <br />50 <br />ug/l <br />Benzene <br />ND <br />050 <br />Toluene <br />ND <br />050 <br />Ethvlbenzene <br />ND <br />050 <br />lvlenes (total) <br />ND <br />050 <br />Surrogate as a-Trifluorotoluene <br />33 < <br />300 111 70-130 <br />LCS (OF05001-BS1) <br />Prepared 05 -Jun -00 Analyzed 07 -Jun -00 <br />Benzene <br />16 2 <br />0 50 <br />ugll 200 81 0 70-130 <br />Toluene <br />180 <br />050 <br />20 0 90 0 70-130 <br />Ethylbenzene p <br />19 4 <br />0 50 <br />20 0 970 70-130 <br />Xylenes (total) <br />59 5 <br />050 <br />600 992 70-130 <br />Surrogate a aa-Trifluorvtoluene <br />264 <br />300 880 70-130 <br />LCS Dup (OF05001-BSD1) <br />Prepared & Analyzed 05 -Jun -00 <br />Benzene <br />165 <br />0 50 <br />ug/1 200 82 5 70.130 l 83 <br />20 <br />Toluene <br />1&1 <br />0 50 <br />200 905 70-130 0 554 <br />20 <br />Etliylbenzene <br />194 <br />050 <br />200 970 70-130 0 <br />20 <br />xylan- (total) <br />591 <br />050 <br />600 985 70-130 0 675 <br />20 <br />Surrogate Aaa•Tnfluorotoluew <br />26.6 <br />300 8&7 70-130 <br />Sequoia Analytical - Walnut Creek <br />The results in tins report apply to the samples analyzed in accordance with the churn of <br />custody document. This analytical report must be reproduced in its entire, <br />i# <br />Page 4 of 6 <br />